Vertex reconstruction:

Using run 2013 Optics C 13foils
finall version V=006 compare with V=0000
a differ in V=000 to V=0000 is the change in db_run.dat offset


now go for sieve:

using run 1893 (BeO) later 1892(C-Optics)

note: must use Left db_beam instead of Right beam (problem preriod)